Staybolt structure



B. E. D. STAFFORD AND E. I 00008.

/ STAYBOLT STRUCTURE. APPLICATION FILED SEPT. 12. 1919.

1,392,236. 7 PatentedSept. 27, 1921.. 7-

5. w fl gq m e. UNITED STATES PATENT OFFICE.

BENJAMIN n. n. STAFFORD ANnnTnAN I. nonns, or PITTSBURGH, PENNSYLVANIA, ASSIGNORS o ELANNEBY BOLT COMPANY,,OF PITTSBURGH, PENNSYLVANIA.

sTAYBoLT S RUCTURE. I

\ Specification of Letters Patent. Patented Sept, 27, 1921.

Application filed September 12, 1919. Serial No. 323,364.

To all 10 ham it may concern Be it known that we, BENJAMIN E. D. STAFFORD and ETHAN I. Doons, citizens of the United States, and residents of Pittsburlgh, in the county of Allegheny and State of ennsylvania, have invented certain new and useful Improvements in Staybolt Structures; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in staybolt structures for boilers,one object of the invention being to provide a universally movable or adjustable mounting for connecting the head of a staybolt with a boiler sheet whereby alinement of the staybolt with its points of connection with the respective boiler sheets shall be insured, and to provide in such a mounting, a simple bearing ring for the bolt head, which shall be adjustable to compensate for variations in the lengths of bolts and which may also be employed to test the bolt.

With this and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claim.

Inthe accompanying drawings; Figure 1 is a sectional view showing an embodiment if our invention, and Fig. 2 is a plan view of the adjustable bearing ring.

1 represents a boiler sheet having an opening 2, a portion of the wall of which may be rounded or curved transversely of the sheet to provide a rounded or curved seat 3 on which a bearing sleeve or member 4 may have a universally movable or adjustable mounting. In the embodiment of our invention shown in the drawing, the bearing sleeve 4; passes through the opening in the boiler sheet and has a rounded exterior portion to rest against the curved or rounded seat 3 in the boiler sheet. mounting the sleeve in'such manner that it shall be universally movable, said sleeve can be so adjusted as to insure accurate alinement of the staybolt with its points of connection with therespective boiler sheets and when the bearing sleeve shall have been thus adjusted, it will be united to the boiler sheet by means of a weld 5.

The bearing sleeve 4 is provided in proxmity to its lower or inner end with an internal annular shoulder 6 and the inner wall of said sleeve is threaded as indicated at 7,Vand said threaded portion may extend from the shoulder 6 to the upper or outer end of the sleeve.

A bearing ring 8 is threaded into the sleeve 4 and, under normal conditions, may rest on the internal annular shoulder 6. This ring is made, interiorly, with a rounded seat 9 for the rounded head of a staybolt 10. .The opening at the inner end of the sleeve 4 may be made flaring as may also the lnner end of the bearing ring, to facilitate the swing of the staybolt. The inner end of the bolt may be secured to the inner boller sheet 11 in any suitable manner.

The threaded bearing ring 8 is provided wlth notches 12 to receive a suitable wrench, and 1t Wlll be seen that by turning said bearing ring, compensation for variations 1n the lengths of bolts may be effected Furthermore, the bearing ring may be employed for testing purposes. That is to say; f, by apply1ng turning force to the ring, said ring turns freely for an abnormal distance, this will indicate that the bolt is broken.

A closure 13 for the sleeve is threaded We claim as new and desire to secure by l Letters-Patent, is

l. In a staybolt structure, the combination with a boiler sheet having an opening, of a bearing sleeve having a threaded interior portion and an internal shoulder near its lower end, a bearing ring located in said bearing sleeve over said internal shoulder and threaded to mesh with the threads in the sleeve, said ring having a seat for the head of a staybolt, a staybolt, having a head seated on said bearing ring, and means closing the outer end of said sleeve.

2. In a staybolt structure, the combination with a boiler sheet having an opening, of a bearing sleeve having an initial universally movable mounting in the boiler sheet,- a weld uniting said sleeve to the boiler sheet, said sleeve threaded interiorly and having an internal shoulder below said threaded portion, a bearing ring threaded Intestiniony whereof, We have signed this into said sleeve above said shoulder and specification in the presence of a subscribhaving a rounded seat for the head of a ing Witness. staybolt, a staybolt having a rounded head BENJAMIN E. D. STAFFORD. mounted on the rounded seat afforded by ETHAN I. DODDS.

said ring, and a closure threadedinto the Witness:

outer end of said sleeve. EDWIN S. RYUE. 

